CATIA is applied to build bend surface designing and three dimension frame model of rolling machine of three roller external screw slant mill, to simulate emulational movement to plot numbered cell mesh and to analysis. 用CATIA建立三辊外螺纹斜轧机的轧制系的曲面造型和三维结构模型,运动模拟仿真,进行有限单元网格划分和分析。